I bought some Kevlar reinforced tires at walmart the " bell " brand. I realize these are not the best quality and they cost 15.00 each but they seem pretty good.... how much would one pay for a "quality" tire... could you recommend a brand to look for....?The rim that fits 26 X 2.125 fits from 26 X 1.75 to about 26 X 2.50 and all decimal sizes between. The frame may not accept the widest ones and the narrower ones must be kept inflated to higher pressures to protect against pinch flats. Quality tires are worth the extra expense and department stores won't have high quality rubber. Kevlar reinforced tires protect against some flats.